二維變重量光正交碼的新結(jié)果
[Abstract]:In 1989, Salehi proposed the concept of one-dimensional constant-weight optical orthogonal code (1D CWOOC), which is applied to the optical code division multiple access (OCDMA) system as a signature sequence. In order to meet the needs of a variety of quality of service (QoS), Yang introduced the concept of one-dimensional variable-weight optical orthogonal code (1D VWOOC) in 1996. With the rapid development of the society, the demand for different types of information is gradually improved. In order to expand the optical orthogonal code, Yang proposed two-dimensional constant-weight optical orthogonal code (2D CWOOC) in 1997, but it is similar to one-dimensional constant-weight optical orthogonal code. The definition of a two-dimensional variable-weight optical orthogonal code is given below. Let W = {1 _ 1,2 _ 2,... , __ r} is a positive integer set, is a positive integer array, Q = (q1, q2...). (qr) is a positive rational number array without loss of generality. A two-dimensional (u, v, a, c, q) variable weight optical orthogonal code, or (u, v, w, a, c, q)-ooc c, is a (0,1) matrix (code word) of a cluster u, v, and satisfies the following three properties: (1) the codeword weight distribution: (1) the codeword in c has a hamming weight in the set w and c is qi. | c | a code word with a weight of wi,1, i, r, i. e., the number of code words with a weight equal to wi as a percentage of the total number of codewords, and thus, r i = 1 qi = 1. (2) Periodic self-correlation: for any matrix X-C, its Hamming weight, wk, W, integer number,0, v-1, (? ) (? ) (3) Periodic cross-correlation: for any two different matrices X, Y, C, integer number,0, and v-1, (? ). The above-mentioned symbol (?) represents a modulo operation for v. If the symbol (1) = (a (2) =... = (a (r) = (a), we will (u, v, W, a, c, Q)-OOC as (u, v, W, a, c, Q)-OOC. If the ratio of (u, v, W, a, c, Q)-OOC is recorded as (u, v, W, HCO3, Q)-OOC. If Q = (a1/ b, a2/ b,... , ar/ b) and gcd (a, a2,... (ar) = 1, then Q is standard and it is clear that b = {r i = 1 ai. If W = {w}, Q = (1). Therefore, the constant weight (u, v, w,1)-OOC can be considered as (u, v, {w},1, (1))-OOC. For optical orthogonal codes, it is said to be optimal when its number of codewords reaches the maximum. However, for the best (u, v, W,1, Q)-OOC, there are some results, but for the best (u, v, W,1, Q)-OOC, we will continue to study and get the following main results. Theorem 1.1.1 Let v be a positive integer, v for each mass factor of 3 (mod 4) and p = 11, there is 1-regular and optimal (6% v, {3.4.6},1, (5/ 7.1/ 7.1/7)) There are 1-regular and optimal (5, v, {3.4.5}.1, (1/ 4.2/ 4.1/4))-OOC. Theorem 1.3 is set to v is a positive integer, v for each mass factor p-3 5 (mod 8) and p-equal to 53, there are 1-regular and optimal (6, v, {3,,4,5},1, (2/11,6/11,3/11))-OOC. The theorem 1.4 is set to a positive integer, and each of the quality factors p-5 (mod 8) and p-{29} of v are 1-regular and optimal (6, v, {3,4},1, (14/19,5/19))-OOC. The theorem 1.5 is a positive integer, and each of the qualitative factors of v is p-5 (mod 8) and p = 53, there is 1-regular and optimal (6} v, {3,4}, The structure of W,1, Q)-OOCs and the third chapter give the optimal (u, v, {3,4},1, Q)-OOCs. The fourth chapter is the summary and the further study.
【學(xué)位授予單位】:廣西師范大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:O157.4
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